Bitcoin guide

What is a satoshi?

A satoshi—usually shortened to “sat”—is one hundred-millionth of a bitcoin: 0.00000001 BTC.

By Stack2One · Updated

1 satoshi
0.00000001 BTC
The smallest standard Bitcoin unit.

The satoshi-to-Bitcoin relationship

Bitcoin balances are often displayed with eight digits after the decimal. Moving the decimal eight places converts BTC to satoshis: multiply BTC by 100,000,000. To convert sats back to BTC, divide by 100,000,000.

SatoshisBitcoin
1 sat0.00000001 BTC
1,000 sats0.00001 BTC
100,000 sats0.001 BTC
1,000,000 sats0.01 BTC
100,000,000 sats1 BTC

Why people use sats

Sats reduce leading zeros. A purchase of 0.00025 BTC is easier for many people to read as 25,000 sats. This becomes especially useful for small payments, recurring buys, fees, and accumulation milestones.

Avoiding unit mistakes

Always check which unit an exchange, wallet, or record uses before copying a value. A misplaced decimal can change an amount dramatically. Keep the unit label next to every number, and use an exact satoshi converter when in doubt.

The unit does not change the asset.Displaying 0.01 BTC or 1,000,000 sats describes the same amount of Bitcoin.

Keep units attached to records

Keep all eight BTC decimal places from source statements. Use columns labeled Amount BTC, Fee BTC, and Cost USD rather than a bare number. For example, 0.00250000 BTC is exactly 250,000 sats. Displaying an amount in a different unit does not change the asset or its value.

One satoshi is the smallest on-chain Bitcoin accounting unit. Some payment-layer systems represent finer amounts internally; that does not change the BTC-to-satoshi conversion used here. See the Bitcoin transaction reference for output-value units.